Update .travis.yml for faster runs
Update .travis.yml for faster runs

The --retry is default on Travis now.
Use Travis container for faster tests.
Cache Bundler downloads.
supriyantomaftuh/router,theocodes/router,lotus/router,AlfonsoUceda/router,vyper/router,Erol/hanami-router,vyper/router,theocodes/router,hanami/router,Erol/hanami-router,lotus/router,AlfonsoUceda/router,hanami/router,supriyantomaftuh/router